Epson ESC/VP21 User Manual page 18

Reading and Writing to S Registers
Sn
Sn?
Sn=x
T Set Tone Dial as Default
Causes the modem to assume that all subsequent dial commands are tone dial.
Select Word or Digit Result Codes
Vn
V0
V I
Xn Select Result Codes
Connect Message
Dialtone Monitor
Busy Tone Monitor
10
Reads S Registers:
Reads the contents of the S register specified by 'n'.
Writing to Registers:
Writes the value of x to the specified S register. All
the registers will return the OK response if x is a legal
value. (n= 0-30, x=0-255)
Displays. result codes in digital format.
Displays result codes in verbose format. (default)
X0 X1
Partial Full
Off
Off
Off
Off
X3
X2
Full
Full
Off
On
Off
On
COMMAND REFERENCE - 2
X4(default)
Full
On
On